Shuttle-box motion for looms.



No. 746.333. PATENTED DEC. 8, 1903.

I FLHOFMANIY. SHUTTLE BOX MOTION FOR LOOMS.

'APPLIUATION FILED SEPT. 10, 1903. N0 MODEL. '2 SHEETS-SHEET 1.

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WITNESSES:

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P. HOFMANN.

SHUTTLE BOX MOTION FOR LOOMS.

APPLICATION FILED SEPT. 10, 1903;

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UNITED STATES Patented December 8, 1903.

PATENT OFFICE.

FEDERIOOHOFMAITNQOF TURIN, ITALY.

SHUTTLE;-B OX MOTION FOR LOOMS.

SPECIFICATION forming part of Letters Patent'No. 746,333, dated December 8, 1903.

Application filed September 10, 1908. Serial No. 172.660., .No model.)

To all whom it may concern:

Be it known that I, FEDERIOO HOFMANN, a subject of the Emperor of Austria-Hungary,- residing in Tnrin, Italy, have invented Improvements in Shuttle-Box Motions for Looms, I

of which the following is a specification.

My invention relates to'shuttl'e-box motions for looms. Various mechanisms have been employed to efiect the vertical dis placement of the shuttleboxes in looms, and among other constructions for the purpose there has been used a lever of the first order whose pivotingpoint and one of the arms were movable by means of eccentrics, while theother arm was pivoted to the rod carrying the shuttle-boxes.

My present invention consists of an improved means for controlling and operating a lever mechanism of this character designed to secure the greatest simplicity of construction combined with the greatest exactness and safety of operation.

In the accompanying drawings I have illustrated the application of my improvements to theleft side of a loom having four shuttles.

In Figures 1 to 4 are represented diagrammatically the positions of the difierent-parts when the difierent shuttles marked I II III IV, respectively, are put in action. Figs. 5 to 11, inclusive, are side views of the controlling-frames for the difierent positions of the shuttle-boxes. Fig; 12 is a perspective view of a part-namely, one of the eccentricswith lantern. Fig. 13 illustrates in a loom an end elevation embodying my invention and Fig; 14 is a side elevation of the corresponding part of the loom which is illustrated in Fig. 1 3.

In the drawings, 1 represents the batten; 2, the rod carrying the shuttle-boxes, having a pivotal connection at 3 with the operatinglever 3 4 5. The rod 6 controls the pivot4 of the lever 3 4 5, while the rod 7 controlsthe .end 5 of the same lever.

Parallel with the batten are fixed to the frame of the loom, by means of the double bracket 8, the two pivots 9 and 10, also parallel with each other and arranged one verticallyover the other. On these two pivots are freely mounted the eccentrics 11 and 12, respectively, the diameters and shapes of the two being approximately the same. Fig. 12 shows in rear perspective new the eccentric 11. On this eccentric 11 is mounted the eccentricestrap of the rod 6,"

while on the eccentric 12 is mounted the eccentric-strap of the rod 7. As already explained,these two rods are pivotally connected to the lever 3 4 5. The axis 4 of said lever, vertically movable, is guided in the guide 13.

the outer end these bars are united by a plate or disk 19, preferably cast in one piece with the rest, as shownin Fig. 12. The disks-15 and 19 have central openings to receive the pivot 9(l0).- These lanterns are mounted to turnwithin as many frames as there are shuttles, four in the present instancenamely, 20,

21,22, and 23.- These several frames are cut with interior teeth di'fiering in the several jcases, as will be seen on reference to Figs, 5,

6, 7, and 8. Thus' the frame 20 has on its inner face, on the right, two teeth above and two teeth'below, the frame 21 has two teeth above on the right and two teeth below on the left, and the frame 22 has two teeth above on the left and two teeth below on the right,

while the frame 23 has two teeth above and 7 two teeth below, all on the left. The upper painof teeth are at such a height as to engage with the lantern, which is mounted on the pivot 9, while the lower pair of teeth are adapt- ;ed to engage with the lantern on the pivot 10. All of the teeth are arranged in such a way ias'not-to-interfere with the lanterns in their movement of semirevolution when the frames are in their-normal positions of rest; but as soon'as one of the frames has been raised a short distance in its upward movement the teeth of that frame will engage with the bars of the lanterns.

The frames arev mounted side by side, asshown in'Fig. 14,'and are movable vertically in guides 23,,su'pported- -by-thebracket '8. v The several frames ar'e-unitedwith their respective liftingbars 25, 26, 27,-and 28, which at their upper endshave hooks 29, 30, .31, and 32, respectively. By means of its hook (which is raised in the well-known way by the knife 33 according to the perforations of the cards 34) each frame is raised in its turnfso that by such movement of the frame or frames the shuttle-boxes are correspondingly moved to bring one or other of the shuttles into action, as desired.

A powerful spring 36 is fixed at one of its ends to the bracket 37, Fig. 13, on the frame of the loom, and there the end of the springs is threaded and provided withtwo nuts to regulate the tension, while at its other end the spring is connected, through a cord passing over a pulley 38, with the arm 3 of the lever 3 4 5, so that the spring thus serves to counterbalance the weight of the boxes and their supporting-rod, the lever, and the two rods 6 and 7.

The four different positions of the boxes with relation to the batten 1 are obtained by means of the difiereut positions of the two eccentrics 11 and 12, each of which can be stopped only at its extreme position above or below. Such position cannot be exceeded, since the tappet 14 of the eccentric then comes against a stop 51, Fig. 14, on the adjacent portion of the bracket 8. To put in operation one of the shuttle-boxes IV III II I, it is necessary to raise the corresponding one of the frames 21 22 23-that is to say, by raising the frame 20, Figs. 5 and 14, the box IV, Fig. 4, is put into working position; by raising the frame 21, Figs. 6 and 14, the box III, Fig. 3, is brought to operative position; by raising the frame 22, Figs. 7 and 14, the box II, Fig. 2, is brought into working position, and, finally, by raising the frame 23, Figs. 8 and 14, the box I is brought into operative position, Fig. 1.

Now considering the frame 20, for example, the four phases of ascending movement of which are represented in Figs. 5, 9, 10, and 11, let us suppose it is desired to put into action the corresponding shuttle IV as soon as the work of the shuttle III is finished. It is necessary that the frame 20 should be raisedthat is to say, that the eccentrics 11 and 12 shall be moved to the positions Fig. 4, (the eccentric 11 at the lower point and the eccentric 12 at the upper point of their respective movements,) changing from positions shown in Fig. 3, where both eccentrics 11 and 12 are at their lower positions. It is evident from Fig. 5 that the upper pairofteeth of the frame 20 will not act upon the bars of the eccentric 11,*while the lower pair will act upon the eccentric 12 and give it a half-revolution when the frame 20 is raised. As soon as the lifting-bar 25 and the frame 20 with it have reached the upper end of their movement they can descend again freely with the knife 33, the bars of both lanterns then being no longer in the path of movement of the teeth of the frame 20, which can thus descend to rest again upon the supporting-base 35.

described is as follows: On a counter-shaft of the loom are mounted a cam 39 and an eccentric 40. The cam 39 acts upon alever 41, pivoted at to the frame and connected at its other end to a rod 42, Figs. 13 and 14, to which it imparts a vertical reciprocating movement. This rod 42is connected at its upper end to an arm on a vertical rod 43, carrying the knife 33. The eccentric 40 has its strap and rod 52 connected to the lower end of a lever 44, Fig. 13, pivoted at 46 to the frame and carrying at its upper end the cylinder 47, over which pass the cards 34, so that a reciprocating movement is imparted to the cylinder 47 to carry the cards toward and from the spring-needle box 48, so as to push back the hooked upperendsof those rods 25, 26, 27, and 28 where there are no corresponding perforations in the card. Thus the knife 33, previously lowered by the rod 43, will on risingagain engage only that hook 29, 30, 31,01- 32 which has not been pushed back. Hovement is thus transmitted to the frames 20 21 22 23.

I prefer to have a releasable connection of the rod 42 with the rod 43, and for. this purpose I make at the upper endof the rod 42 a semicircular recess to receive a pin 50, which is carried by the rod 43 and is normally held in the recess of the rod 42 by means of the spring-plate 49, which is carried by the rod 42, and at its free end this spring bears against the pin to hold it in its recess. If a shuttle should not at the proper moment entirely enter its box, but should remain partially projecting out of it, preventing the vertical displacement of the boxes, the spring 49 will allow the pin 50 to escape from the semicircular recess in the rod 42, and so prevent breakage. When the shuttle has, been put in place again, the rods 42 and 43 can be reconnected at 50.

The position of the tappet 14 of each of the. eccentrics is such that it comes to rest againstthe corresponding stop 51 of the bracketS just at the moment when the frame raised has imparted to the lantern a half-revolution-that is to say, its complete movementand the teeth of the frame consequently have left the rods of the lanterns. The parts then come into the position of rest; but it is necessary also that they should be. maintained with certainty in this position. This is pro.-

vided for, on the one hand, by the special-form the third bar of the lantern, this third bar,

finding itself in a horizontal planeat right angles to the vertical plane passing through the other two bars. By this kinematic arrangement any efiort, however considerable, exerted at the ends 4 5 of the respective rods 6 7 will not displace the eccentrics from their extreme positions, the leverage being so slight. The displacement of the eccentrics will therefore only be brought about by the raising of one of the other frames-that is to say, only when it becomes necessary to change shuttles.

I claim as my invention- 1. In a shuttle-box motion for looms an apparatus for controlling the change of shuttles having shuttle-boxes and their operating-lever, two eccentrics having straps and rods connected to said lever, the eccentrics combined with lanterns each having three bars of which two are in the same diametrical plane'and the third is in a plane at right angles thereto, in combination with toothed centrics having straps and rods connected to said lever, means for imparting semirevolntions to the eccentrics, the latter and the rods being on approximately dead-centers at the ends of such half-revolutions, and tappets and fixed stops to arrest the eccentrics at the ends of their half-revolutions, substantially as described.

4. In a shuttle-box motion for looms, an apparatus for controlling the change of shuttles, having shuttle-boxes and their operating-lever, two eccentrics having straps and rods connected to said lever, the eccentrics combined with lanterns'each having three bars'of which two are in the same diametrical plane, and the third is in a plane at right angles thereto, in combination with toothed frames to operate the lanterns, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FEDERIOO HOFMANN.

, Witnesses:

HUGO FRYGREN, M. POLLONE. 

